Make and ice heart-shaped mini cakes. Prepare batter following recipe directions. Bake and cool cakes according to pan package directions. Place cakes on cooling grid over cookie pan.
Reserve 1/4 cup white icing for decorating cakes. Heat remaining icing in can in microwave at defrost setting (30% power) for 20-30 seconds; stir. Repeat until consistency of icing will pour. Use heated icing in a cut disposable bag to cover mini cakes. Let set in refrigerator until firm.